stapon251 - 12/19/2008 12:57 AM . They (barnacles) are ubiquitous The aluminum boat guys must know or are not confessing. Come on . THT.
PS I own a 34 ft aluminum welded boat and I ran into a serious barnacle problem
I strongly suggest you not use any acids
I strongly suggest you not use any copper tools . . . only stainless or aluminum
I had my boat blasted with what I believe were walnut shells after the worst was scraped off
What I said in my post above worked on my aluminum hull . . . ask the coast guard as they have lots of aluminum hulls . . . but you need two coats of primer and you have to use bottom paint especially formulated for aluminum . . . there is also a minimum and maximum time between each coat of primer and bottom paint
I strongly suggest you not use bottom paint intended for a fiberglass boat on an aluminum boat
Interluxwebsite has lots of info on bottom painting aluminum hull . . . they make a great product Again, you may have serious pitting under the barnacles as described in my post above . . . don't be surprised . . . there are a number of fillers you can use to fix the pits, but you have to blast them clean, a wire brush may not work